<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>ES6语法功能简单介绍</title>
</head>
<body>

<h4>for循环计数器很适合用let</h4>
<script>
    for (let j=0;j<10;j++){
        console.log(j);
    }
</script>
</body>
</html>
